FFS, what is it that goes wrong in people's brains, that causes them to look at something that seems completely unreal but then start from the assumption that, rather than not being real, actually it's totally real and it's the whole world that's mad?

I was walking down one of the streets parallel to Totenham court road a couple of years ago. There were a couple of guys at the back of a lorry working and I noticed that they were getting a parking ticket. I started laughing so did my colleague who was with me. Quickly there was a small crowd crying with laughter. The guys at the back of the lorry quickly noticed and we all pointed to the front of the lorry. There was then a massive arguement with the traffic warden. The problem was they had just got a ticket for being on a double yellow line, which they had just painted.